Lock



.Fume 24. 1924. 1,498,802

A. MCRAE ET AL LOCK Filed April l5 1921 Patented lune 24, 1924.

1 emerse srarss A rarsrar n 'oFFic-E 'ALEXANDER `ivicEaE, or TORONTO, omarmd CANADA, ANnJosEPH `i\T. *eREGo`RY,F

Y or BUFFALO, LivEw YORK.

Loox.

v.fippiifmion med April 15,1921. serialv No. 461,645. A

T0 all whom t may concern.'

Be it known that we, ALEXANDER MGRAE, a citizen of the Dominion of Canada, residing in the city of Toronto, Province of Ontario, Canada, and JOSEPH N. GREGORY, a citizen of the United States of America, residing in the city of Buffalo, county of Erie, and State of New York, have invented certain new and useful Improvements in Locks, `of which the following is a full,

' ,eled'face clear, and exact description.

The principal object of our invention has been to provide a lock having comparatively few parts; being simple in its construction; and very durable.

Anotherv object has been to provide a lock so constructed that the operating means may be disconnected so that it has no action upon the draw-bolt of the lock.

Furthermore, when our device is locked, it cannot be opened by forcing a thin object against the end of the draw-bolt.

These, as well as other advantages which will be Vapparent to those skilled in the art, have been accomplished by the device shown in the accompanying drawings, of whichz Fig. 1 is an exterior view of the lock in f place attached to a door. n

Fig.'2 is an interior view of the lock with one-half ofthe cover removed, showing the.

rmay be held rin the position shown in Fig.

parts'in their unlocked positions.

Fig. 3 is a similar view showing the parts in their locked positions.

Fig. 4 is atransverse, sectional view taken on line 4-4 of 3. A J Fig. 5 is a transverse, sectional view taken on line 5 5 of Fig. 3 Y l The device comprises a body 10 formed preferably of two halves 11 and 12, which are secured together by any suitable means.- 13 is the draw-bolt which is slidably mount" ed within the body and provided with a' stem 14. The inner end of the stem 4is slidably supported by a wall 15, a half ofwhichis formed in each of the halves-11 and 12 of the body. A helical spring 16 is disposed about the stem v15 and serves, in a well known manner, to keep the draw-bolt 13 pushed outwardlyto its normal position, as shown inthe drawings. The draw-bolt 13 is, of course,

` 17 is a draw-bolt 'armt which its inner :a 'vertical plane.

provided with the usual bevend disposed within a vertical slot formed inthe innerend of the stem 14. This drawbolt arm is disposed in a recess 26 and a pivot pin 18 connectsthe vinner end of the draw-bolt arm with the stem 14, whereby the arm is pivotally united with the stem so as to permitof oscillation of the arm in 19 4is a flat spring which is rigidly secured at its inner Iend to the stem 14 and has its outer end bearing on top of the arm 17, whereby it'is normally pressed downwardly to a position in line with the .stem y14. This draw-bolt arm is provided with a shoulder 20 and with an inclined surwhen the arm occupiesthe normal position f or that shown in Fig. 2. It is clear that whenzthe draw-bolt arm 17 is in this position, the draw-bolt 13 may be drawninto the lock by the rotation of the tumbler 23.

Releasing means are provided for the:`

tumbler 23, whereby the draw-bolt arm 17 3. These means comprise a release tumbler 27 which is rotatably mounted in the body 1() and is preferably arranged between ythe operating tumbler 23 and the end of the stemy 14. This release tumbler is provided with a release lug -28 which, whenl theV release tumbler is rotated to Vthe position shown'by the full 'lines' in Fig. 3,- willl raise the draw-bolt arm -17 upwardly and hold it in the position shown by the full lines in this ligure'. The release tumbler 27 is preferably limited in` itsA motion, whereby the lug 28 will be preventedV from moving loeyond a predetermined point.' A' central aperture'43of'the usual polygonal shape is formed in the operating tumbler '23, whereby 'it may be operatedby the doorA knob 44.

A shoulder 29 is formed atthe upper side. of the recess 26,'and the outer' end 22"ofy the draw-bolt arm' is engageable with this shoulder when the arm is heldin its locked POSitioa as awr is Fig 3- "Thus 19@ y draw-bolt can not be forced inwardly by any thin object placed between the door jamb and the beveled face of the bolt.

The release tumbler 27 is provided at one side with a trunnion 30 and at the opposite side with a trunnion 31, by which it is rotatably disposed in the body 10 of the lock. The trunnion 30 is provided with a central aperture in which a helical spring 32 is disposed. rIhis spring normally maintains the release tumbler in the position Shown in Fig. 5. The trunnion 31 is interiorly screwthreaded and a knurled release knob 33 is screw-threaded thereto. Therecess formed .in the body in which the release lug 28 operates is slightly wider than the width of the release lock, for purposes hereinafter described, and the knurled knob 83 provides means for rotating the release tumbler and pushing it axially against. the tension of the spring 32 when desired.

The release knob 33 is disposed at the inside 'of the door and provides means for loclfing the device :trom the interior only. So as to be able to actuate the lock from the enterior of the door, we provide a lock ba`rrel 34 preferably of the well known pin tiii'rfnbler type which is secured in a suitable recess formed in the portion of the lock which faces the exterior of the door. 35 is the 'operating' tab of the :lock barrel which. is "disposed in a suitable recess 46 formed in the opposite portion of the lock body.

l The axis of the lock barrel 34 and the axis of therelea-se knob are preferably at `some-distance from each other, and are connected by means of gear segments 36 and 37. These segments are disposed in a shallow recess 38 ot a depth substantially equal to the thickness of the segments. The

-hub portion 39 vof the segment 37 is disposed in a suitable circular recess within which it may be oscillated, and a slot 40 is formed at the center' of this hub portion through which the operating tab 35 of the lock barrel is passed. The gear segment 36 is rotatably disposed upon the trunnion 31 of the release tumbler ,27. It is provided with a radial slot 4l with which a pin'42 is engageable. The pin 42 is carried by the trunnion 31 and is pressed into engagement with the slot 41 by means of the spring 2, when the pin is in registering position vwith the slot. Thus the actuation of the release' knob and the lock barrel are somewhat independent of each other.

When the parts are in the posi-tions shown i in Fig. 3, it will be seen that the draw-bolt arni will beheld in its elevated position,

and that the shoulder 2Ov will lie in a position where it cannot be` engaged with byr the Y tumbler arm 24. The door knob 44 may thus be freely rotajted without causing the draw-bolt 13to be. operated. When, however, the :lug 28 .O the release tumbler is moved to the position shown in Fig. 2, the draw-bolt arm 17 lwill be pressed into its other position or that shown in Fig. 2

bolt in the position shown and preventing its being 'forced inwardly by any thin ob- ,ject passed between the door and the door jamb.

The draw-bolt arm 17 may be moved to the positions shown in Figs. 2 and 3 either from the outside ci' the door or from the inside thereof. The device remains normally in its locked position, and when it is to be unlocked Yfrom the exterior of the door, the key is inserted in the lock barrel 84 and turned. lVhen the key is turned, the release tumbler will be moved to the position shown in Fig. 2 through the medium ot the gear lsegments 37 and 36. It is, of Course, assumed that the pin 42 is in engagement with the slot 41 ofthe gear 'segment 36, so that the motion given to the gear segment 3.6 will be transmitted to the release tumbler 27. lf, however, this pin is not in engagement with its groove, the device has been unlocked from the inside of the door and the insertion and turning of the key will simply move the gear segments to the point where the pin' will engage with the slot 41. hen the key is moved back to the position where it can be withdrawn, the device will be locked. It will be seen that when the key is withdrawn from the lock barrel 34, the gear segments 36 and 37 will be held in the positions sho-wn in Fig. 3 and the device will be locked. When it is desired to unlock the device from the interior', the release knob 33 is pushed inwardly against the tension of the spring 32 thereby pushing the pin 42 out of engagement with the slot 41. The knob may then be rotated so as to move the arm 28 of the release tumbler to the position shown by the dotted lines in Fig. 3, whereby the device will be locked. Then the release knob 33 is moved in the reverse direction, the pin 42v will automatically engage with the slot 41 when the arm 28 of the release tumbler has been moved to the position shown by the full lines in Fig. 3, whereby the device will be loeked. y

Obviously, some modifications of the details herein shown and described may be made without departing-from the spirit of our invention or the scope of the appended claims; and, we do not, therefore, wish to be limited to the exact embodiment herein shown and described, the form described being merely a preferred embodiment thereof,

Having thus described our invention, what we claim is:

1. A lock characterized by having a body, a draw-bolt slidably mounted in the body, a draw-bolt arm pivotally attached to the draw-bolt and movable within a recess formed within the body, a shoulder formed by the recess, the end of the arm being engageable with the shoulder, and means for holding the arm in a position where it will be engageable with the shoulder of the recess, whereby, when so engaged, the drawbolt will be locked against inward movement.

2. A lock characterized by having a draw-bolt, a draw-bolt arm pivotally carried by the draw-bolt, an operating tumbler engageable with the arm, a release tumbler engageable with the arm, and means for actuating the release tumbler, comprising a release knob at one side of the lock, and key controlled means at the other side of the lock. i

3. A lock characterized by having a on the opposite side of the lock, and means connecting the release tumbler with the key controlled means, whereby the release knob and the release tumbler may be operated independently of the lock controlled means.l

4. A lock characterized by having a draw-bolt, a draw-bolt arm pivotally carried by the draw-bolt, an operating tumbler engageable with the arm, a release tumbler engageable with the arm, a release knob arl ranged at one side of the lock and connected to the release tumbler, key controlled means on the opposite side of the lock, gear segments connecting the release tumbler with the key controlled means, and means 'for dis- .connecting the release tumbler from the segments, whereby the release knob and the release tumbler may be operated independently of the key controlled means.

In testimony whereof, we have hereunto signed our names.

ALEXANDER MCRAE. JOSEPH N. GREGORY. 

